EP0243197B1 - Werkzeuge zur Bearbeitung von Röhren - Google Patents

Werkzeuge zur Bearbeitung von Röhren Download PDF

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Publication number
EP0243197B1
EP0243197B1 EP19870303634 EP87303634A EP0243197B1 EP 0243197 B1 EP0243197 B1 EP 0243197B1 EP 19870303634 EP19870303634 EP 19870303634 EP 87303634 A EP87303634 A EP 87303634A EP 0243197 B1 EP0243197 B1 EP 0243197B1
Authority
EP
European Patent Office
Prior art keywords
pipe
support frame
tool according
scraper
rollers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19870303634
Other languages
English (en)
French (fr)
Other versions
EP0243197A1 (de
Inventor
Bruce Allan Tasker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Friatec AG
Original Assignee
Friedrichsfeld GmbH Steinzeug und Kunststoffwerke
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Friedrichsfeld GmbH Steinzeug und Kunststoffwerke filed Critical Friedrichsfeld GmbH Steinzeug und Kunststoffwerke
Priority to AT87303634T priority Critical patent/ATE70744T1/de
Publication of EP0243197A1 publication Critical patent/EP0243197A1/de
Application granted granted Critical
Publication of EP0243197B1 publication Critical patent/EP0243197B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/021—Cleaning pipe ends or pipe fittings, e.g. before soldering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/02—Carriages for supporting the welding or cutting element
    • B23K37/0276—Carriages for supporting the welding or cutting element for working on or in tubes

Definitions

  • the invention relates to tools for preparing the surfaces of end portions of pipes according to the preamble of claim 1.
  • Such pipes may be of plastics material.
  • EP-A-0000808 describes an apparatus for cleaning and descaling the outside of pipe lines comprising a cage mountable on the pipe line and bearing a carriage moveable on the cage around the pipe line.
  • the carriage supports an elongate arm to lie in the longitudinal direction of the pipe and a cleaning head is reciprocable along the arm to clean the exterior of the pipe.
  • the cage is provided with an indexing mechanism to step the carriage around the pipe line.
  • US 5301 872 describes an internal pipe beveling attachment from pipe beveling machines comprising an indexing wheel which rides around the periphery of a pipe.
  • a cutter or grinder is carried on the support structure from the indexing wheel and serves to bevel the inside of the pipe as the wheel moves around the periphery.
  • DE-A-1290843 describes apparatus for the beveling or machining the inside surface of a pipe end comprising a frame which is securely attached to the outer surface of the pipe having a grinding mechanism connected thereto.
  • the grinding mechanism includes a grinding wheel which is moved in a generally circular path while being reciprocated to grind the inner surface of the pipe.
  • GB 2159743B discloses a scraper for scraping cylindrical objects such as the ends of pipes.
  • the scraper consists of a helically bladed rotary scraping member mounted in a frame, the member being rotated circumferentially round the end of a pipe so that a longitudinal scrape occurs along a length of the pipe at or adjacent the end thereof.
  • thermoplastics material for surrounding a pair of aligned thermoplastics pipes and straddling the junction between those pipes.
  • an electrical resistance wire Into the inside wall of the thermoplastics connector is inlaid an electrical resistance wire and, by passing an electrical current through this wire, the thermoplastics material of the connector is melted to weld the connector to the aligned pipes.
  • Hand-held scraper devices have been used to achieve this cleaning.
  • Such devices generally comprise hand-held scraper tools which in use are drawn longitudinally of the pipe in a series of strokes, each stroke filing or planing away a surface portion of the pipe.
  • the invention provides a tool for preparing the surfaces of end portions of pipes for jointing, said tool comprising a support frame mountable on the end portion of a pipe to be cleaned; means for moving the support frame in a circumferential path around the end portion of the pipe, mounted on the support frame for treating a portion of the outer surface of the pipe as the support frame travels its circumferential path around the pipe, characterised in that means are provided for progressively moving the treatment means longitudinally of the support frame and pipe as the support frame travels its circumferential path around the pipe, to impart to the treatment means a helical movement over the surface of the pipe.
  • the abrading means is a scraper for scouring said outer surface.
  • the helical movement being achieved by a combination of the circumferential movement of the support frame around the pipe and longitudinal movement of the abrading means relative to the support frame and thus the pipe, results in the fact that by the time the treatment or operating (scraper) means has moved longitudinally for a complete traverse of the support frame, a complete end portion of the pipe has been prepared and has had its surface oxide film removed.
  • This prepared end portion need not extend completely to the end of the pipe; it is sufficient that the prepared end portion should span the axial zone of the pipe connector which in use is to be heated for fusion to the pipe.
  • the direction of longitudinal movement imparted to the scraper means may be towards or away from the pipe end. Movement of the scraper means towards the pipe end does provide the advantage, however, that the reaction force on the tool or pipe scraper would then be in a direction to draw the pipe scraper firmly onto the pipe end as opposed to pushing it off the pipe end.
  • the support frame preferably comprises rollers which engage the pipe surface and hold the pipe scraper on the pipe as it is moved in its circular path around the pipe.
  • the rollers may be provided so as to contact different angular locations around the outer and/or inner peripheral surfaces of the pipe.
  • the rollers may be on two or more axes, with the rollers on one of those axes engaging the outer surface of the pipe substantially in line with the scraper means, to define a predetermined alignment of the scraper means.
  • the relative positions of the axes on which the rollers are mounted may be adjustable, to accommodate pipes of different sizes.
  • a mechanical locking device may be associated with one or more of the axes, to move the axes mutually together or apart to grip the pipe between the rollers.
  • the mechanical locking device may for example comprise a cam, a screw or a ratchet.
  • the scraper means may be a movable cutter, such as a rotary grinding wheel or cutter head; or it may be a fixed cutter such as a rasp or plane blade.
  • the cutter which may be carried by a cutter block, may be biased, relative to the support frame, in a direction against the pipe outer surface. A load is thus exerted by the cutter which is preferably perpendicular to the pipe surface and the self-adjusting bias of the cutter mounting ensures that the cutting edge remains firmly in contact with the pipe surface irrespective of the curvature or contour of the pipe.
  • the means for moving the scraper means may comprise a lead screw geared to the means for moving the support frame, which lead screw engages the scraper means for advancing the scraper means relative to the support frame on movement of the support frame in its circular path around the end portion of the pipe.
  • a pipe scraper according to the invention can be used in even the cramped conditions that subsist at the bottom of a pipe-laying trench, and make it possible for the user quickly and efficiently to scrape clean the end 15 - 25 centimetres or thereabouts of the pipe, immediately before fitting and heat welding a resistance wire heated pipe connector.
  • the pipe scraper illustrated in the Figures comprises a support frame 2 comprising a platform portion 4 and two extension portions 6 at right angles to the platform and supporting a pair of guide rails 8, 10.
  • a block 12 which supports a cutter 14 in a manner to be described below.
  • the guide rails are linked at their outer ends by a cross piece 16 which supports two slidable rods 18 on which are provided, one upon each rod, a pair of guide rollers 20 having splined, pipe-contacting surfaces.
  • Two further, similar rollers 22 are mounted for rotation in the extension portions 6.
  • the rollers 20, 22 are mounted for contact with an external surface of a pipe 24 (see Figure 4).
  • the platform portion 4 of the frame 2 supports a further pipe-contacting roller 26 which is intended to contact the internal surface of the pipe as shown in Figure 4.
  • the roller 26 which in the present example is of a diabolo configuration, is mounted for movement between an inoperative position shown in Figure 1 in which a pipe end may readily be inserted between the roller 26 and the rollers 20 and 22, and an operative position shown in Figures 2 and 4.
  • the roller 26 is rotatably mounted on a bearing mounting 28 pivotally supported at 30 on an end portion of an L-shaped arm 32.
  • the arm 32 passes through an aperture 34 in the platform 4 the underside of which platform provides a reaction surface 36 for a free end of the arm 32.
  • a leaf spring 38 Secured to the arm 32 is a leaf spring 38, the free end of which bears against a rod 40 spanning two flanges 42 depending from the platform portion 4. At an intermediate region of the spring 38 it is caused to turn through approximately 90° about a control rod 44 of a lever-operated cam arrangement 46 mounted in the flanges 42.
  • the lever 48 When the lever 48 is moved clockwise from the position shown in Figure 1 to the position shown in Figure 2, the control rod 44 moves from a position sited at the upper part of the cam arrangment 46, as viewed in the Figures, to a position at the lower part thereof.
  • This causes the arm 32 to move from a position in which the roller 26 is inoperative into a position in which the roller 26 firmly clamps the pipe 24 against the rollers 20 and 22, the leaf spring 38 acting as a spring-biasing means.
  • the external surface thereof is contacted by the cutter 14.
  • the cutter is received in the block 12 in a spring-loaded mounting 50 which permits accommodation of a range of pipe diameters, and/or irregularities in contour or surface characteristics.
  • the form of the cutter 14 is illustrated in Figures 5 to 8.
  • the cutting tip comprises a cutter edge 52 arranged at an oblique angle, in the present example approximately 15° with respect to the axis of the portion of the pipe being scraped thereby.
  • the direction of travel of the tool is shown by arrow A.
  • a surface 56 adjacent to the surface 54 is formed as a land in the radial plane of the tip and is adapted to contact the pipe surface as it is cut, to control the depth of the cut.
  • the cutter 14 is caused to scrape a helical sliver from the external surface of the pipe by grasping a handle 58 of the scraper and causing the scraper to progress around the periphery of the pipe end.
  • the operation of the handle is as follows. As the peripheral progress is carried out, the handle itself is mounted so as not to rotate in the user's hand, although the scraper revolves about the axis of the pipe. Thus a lead screw arrangement 60 received within an internally threaded bore of the handle 58 acts to cause longitudinal movement of a sleeve 64 surrounding the screw arrangement and secured at its upper end to the block 12. Therefore, as the peripheral movement of the scraper progresses the sleeve is retracted into the handle and thus causes the block 12 to move downwardly (as viewed in Figures 1 and 2) to provide the required helical movement.
  • the end portion of the thread of the lead screw may be provided with safety means to prevent damage in the event of an attempt to make additional turns of the apparatus.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Turning (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Basic Packing Technique (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Earth Drilling (AREA)
  • Cleaning In General (AREA)

Claims (14)

  1. Werkzeug zum Vorbereiten der Oberflächen von Endbereichen von Rohren zur Verbindungsherstellung, mit einem Tragrahmen (2), der am Endbereich eines zu reinigenden Rohres befestigbar ist, mit einem Mittel (58) zum Bewegen des Tragrahmens in Umfangsrichtung um den Endbereich des Rohres, mit einem am Tragrahmen befestigten Mittel (14) zum Bearbeiten eines Bereiches der Außenfläche des Rohres, während der Tragrahmen in Umfangsrichtung um das Rohr wandert, dadurch gekennzeichnet, daß Mittel (60,64) zum fortschreitenden Bewegen des Bearbeitungsmittels (14) längs des Transportrahmens (2) und des Rohres (24), während der Transportrahmen in Umfangsrichtung um das Rohr wandert, vorgesehen sind derart, daß dem Bearbeitungsmittel (14) über die Oberfläche des Rohres hinweg eine schraubenförmige Bewegung erteilt ist.
  2. Werkzeug nach Anspruch 1, dadurch gekennzeichnet, daß Rollen (20) vorgesehen sind, die im Betrieb zumindestens äußere Wandflächen des Rohres (24) ergreifen.
  3. Werkzeug nach Anspruch 2, dadurch gekennzeichnet, daß mindestens eine weitere Rolle (26) vorgesehen ist, die mit einer inneren Wandfläche des Rohres (24) in Verbindung bringbar ist.
  4. Werkzeug nach Anspruch 3, dadurch gekennzeichnet, daß Klemmittel (44,46,32) vorgesehen sind, mit denen eine Rohrwand zwischen den Rollen (20,26) klemmbar ist.
  5. Werkzeug nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß aus den Rollen (20,26) ausgewählte Rollen mit mit dem Rohr in Verbindung stehenden, aufgerauhten Oberflächen versehen sind.
  6. Werkzeug nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Klemmittel eine nockengesteuerte Hebelanordnung aufweisen, mit der die weitere Rolle (26) zum Bearbeitungsmittel (14) hin vorspannbar ist.
  7. Werkzeug nach Anspruch 4, 5 oder 6, dadurch gekennzeichnet, daß das Klemmittel zur Anpassung an einen Bereich von Rohrdurchmessern und von Konturen- oder Oberflächenunregelmäßigkeiten mit einer federvorgespannten Befestigung (38) versehen ist.
  8. Werkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Bearbeitungsmittel eine Schabervorrichtung (14) ist.
  9. Werkzeug nach Anspruch 8, dadurch gekennzeichnet, daß die Schabervorrichtung ein Messer aufweist.
  10. Werkzeug nach Anspruch 9, dadurch gekennzeichnet, daß das Messer mit einer federvorgespannten Befestigung (50) versehen ist, durch die ein konstanter Schneidekontakt des Messers mit dem Rohr aufrecht erhalten werden kann.
  11. Werkzeug nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß das Messer-Vorderteil eine Schneidkante (52) und einen dazu benachbarten Schneidrücken (56) aufweist, der im Betrieb eine äußere Wandfläche des Rohres zur Steuerung der Schnittiefe berührt.
  12. Werkzeug nach Anspruch 11, dadurch gekennzeichnet, daß die Schneidkante zur Achse des Rohres geneigt angeordnet ist.
  13. Werkzeug nach Anspruch 2, dadurch gekennzeichnet, daß zwei im Abstand angeordnete Paare von Rollen (20,22) und Mittel (18) zum Ändern des Längsabstandes, in welchem die Rollenpaare angeordnet sind, vorgesehen sind.
  14. Werkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß Mittel zum Bewegen des Bearbeitungsmittels eine Gewindespindelanordnung (60) aufweisen, die von dem Mittel (58) zum Bewegen des Tragrahmens (2) gesteuert ist und welche bewirkt, daß die Schabervorrichtung (4) bei der Bewegung des Tragrahmens in Umfangsrichtung um den Endbereich des Rohres sich relativ zu diesem Tragrahmen (2) vorwärtsbewegt.
EP19870303634 1986-04-25 1987-04-24 Werkzeuge zur Bearbeitung von Röhren Expired - Lifetime EP0243197B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87303634T ATE70744T1 (de) 1986-04-25 1987-04-24 Werkzeuge zur bearbeitung von roehren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8610189 1986-04-25
GB868610189A GB8610189D0 (en) 1986-04-25 1986-04-25 Pipe scraper

Publications (2)

Publication Number Publication Date
EP0243197A1 EP0243197A1 (de) 1987-10-28
EP0243197B1 true EP0243197B1 (de) 1991-12-27

Family

ID=10596854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870303634 Expired - Lifetime EP0243197B1 (de) 1986-04-25 1987-04-24 Werkzeuge zur Bearbeitung von Röhren

Country Status (6)

Country Link
EP (1) EP0243197B1 (de)
AT (1) ATE70744T1 (de)
DE (1) DE3775451D1 (de)
ES (1) ES2028867T3 (de)
GB (2) GB8610189D0 (de)
GR (1) GR3003909T3 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8623079D0 (en) * 1986-09-25 1986-10-29 Rutland Plastics Pipe end preparation tools
DK511288A (da) * 1988-09-14 1990-03-15 Shamban W S Europ Skrabeindretning til for eksempel en aksel eller spindel
GB0005983D0 (en) * 2000-03-14 2000-05-03 Kenworthy David M A Pipe cutters
GB201107030D0 (en) * 2011-04-27 2011-06-08 Caldervale Technology Ltd Pipe scraping tool
CN105964630A (zh) * 2016-05-29 2016-09-28 广东技术师范学院 一种建筑用收卷水管清理装置
CN110142853B (zh) * 2019-06-06 2021-05-11 广州德亚机械制造有限公司 一种管模清理系统
CN112605567B (zh) * 2020-08-14 2022-11-25 龙工(上海)机械制造有限公司 一种装载机铲斗的斗体焊接方法
CN112809480B (zh) * 2021-01-20 2022-05-17 江苏海劭科技有限公司 一种机械加工用稳定固定铁管的端头打磨装置
CN113910036B (zh) * 2021-09-29 2022-06-24 河北科技大学 一种电力施工用电力管热熔对接固定装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2159743A (en) * 1984-06-07 1985-12-11 British Gas Corp Pipe scraper

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545329A (en) * 1948-12-06 1951-03-13 Witham Leonard Tool for cleaning and polishing tubing ends and fittings
GB697042A (en) * 1950-05-10 1953-09-16 Ruhrstahl Ag Improvements in or relating to devices for cutting threads in pipes and lengths off pipes
GB743551A (en) * 1953-06-17 1956-01-18 Pass & Company Ltd E An improved thread milling machine
FR1425397A (fr) * 1964-12-04 1966-01-24 Ct De Rech S De Pont A Mousson Machine à meuler les emboîtements de tuyaux en béton
US3501872A (en) * 1966-08-08 1970-03-24 Mary C Harter Internal pipe beveling attachment for pipe beveling machines
US4368876A (en) * 1981-04-30 1983-01-18 Koei Machine Co., Ltd. Self-propelling bevel fusion-cutting machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2159743A (en) * 1984-06-07 1985-12-11 British Gas Corp Pipe scraper

Also Published As

Publication number Publication date
GB8610189D0 (en) 1986-05-29
GB2189567A (en) 1987-10-28
GB8709917D0 (en) 1987-06-03
GR3003909T3 (de) 1993-03-16
ATE70744T1 (de) 1992-01-15
ES2028867T3 (es) 1992-07-16
DE3775451D1 (de) 1992-02-06
GB2189567B (en) 1990-05-09
EP0243197A1 (de) 1987-10-28

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